Cummins ISB4.5 CM2150 Fault Code: 492 PID: SID 88 SPN: 1189 FMI: 4 Turbocharger 2 Wastegate Control Circuit – Voltage below normal, or shorted to low source.

Circuit Description
The wastegate actuators are devices used by the ECM to control boost pressure.

Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position.

Conditions for Setting the Fault Codes
The turbocharger 2 wastegate control signal is not detected to be system voltage when the signal is turned on.

Action Taken When the Fault Code is Active
The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code
The ECM will turn off the amber CHECK ENGINE light immediately after the diagnostic runs and passes.

Possible Causes
-A short circuit to ground in the harness

Categories Cumminz, DTC TRUCKS, ISB4.5 CM2150 Tags -, 2, 88, Below, Circuit, CM2150, Code492, Control, Cummins, Fault, FMI4, ISB4.5, Low, Normal, or, PIDSID, Shorted, Source., SPN1189, to, Turbocharger, Voltage, Wastegate

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